leaflet
open-source JavaScript library for mobile-friendly interactive maps, designed with simplicity, performance and usability in mind
plotly.js
Built on top of d3.js and stack.gl, plotly.js is a high-level, declarative charting library. plotly.js ships with 20 chart types, including 3D charts, statistical graphs, and SVG maps
bokeh
Python interactive visualization library that targets modern web browsers for presentation. Its goal is to provide elegant, concise construction of novel graphics in the style of d3.js
Vega
A visualization grammar, a declarative language for creating, saving, and sharing interactive visualization designs